In the Carrie 2013 thread I mentioned "The Loved Ones." I oversold it saying it a mix of Psycho, Carrie, and Texas Chainsaw. Those are all classics in their own rights. However, it's a good satire of horror films that will make you laugh and cringe. The soundtrack/score is excellent!

Wild Zero is a Japanese zombie film I have yet to watch but a friend recommended.

A list of some of my favs:
The Shining
Silence of the Lambs
Let the Right One In
Evil Dead 2
Rosemary's Baby
American Psycho

Not horror but are classics w/ plenty of gore:
Old Boy
Battle Royal

I really don't like horror so I haven't watched many, nor do I like the "so bad it's good" films.

The first Hellraiser is a DAMN scary & underrated *ed- not in cult fanboy circles, but you almost never see them on tv - movie, same for Lord of Illusions... so good they're almost too scary for today.

Another VERY scary story is a recent tv program you can watch if you have On Demand.

Go to sc-fi channel, click Paranormal Witness & watch the REAL story of the Travis Walton alien abduction, interviewing all of the major players. I DARE you to watch this & come away not believing the veracity of every single guy, they would all pass any body language experts tests with FLYING colors, they also all passed lie detector tests soon after it happened.